Yeah, I was 20mph tops, still a little clutch in first gear coming out of a hairpin. Just didn't look through far enough and got a surprise for my mistake.
As for how we work that out, it's the very thing you pointed out. Getting on the power lifts the front wheel, makes it lighter. Now you want to apply power with that lightened load? Wheelspin is a possibility, although the hydraulic system is not supposed to drive the wheel any faster than the tranny output, so the front shouldn't spin unless the rear's slipping, too. Nevertheless, it could overwhelm the friction circle if you're too close to the edge of it.
Comparing to to FWD or AWD in a car isn't quite valid for a couple of reasons. First, because there's no diff, so no way the front takes more torque than it's fed by the hydraulics. That makes a nice limit to the system, and yet if the front gets light enough, the drive force can pull it to the outside harder than an undriven wheel, and you'll lose the front end. Second, because there's less steering angle. Don't think of it as pulling to the inside like a car's wheel, which is steered. Remember that a bike's front end is very close to straight ahead, the turning comes from the lean. If you want to turn harder, the front wheel actually gets steered the other way. You push down on the bar toward the way you want to go, and the countersteer induces lean. If the front wheel is pulling, it will widen the turn. That's the very definition of understeer.
As for drag at the front end when the throttle closes, I would really hope the thing freewheels, kind of like a torque converter in a car.